Concrete compressive strength At 28 days 50 N/mm^2 characteristic using 100 mm cubes
Sleeper Length 2700
Type of Rail R-65 and R-50
Strand to comply with BS 5896; diameter 9.3 mm; relax class 2; tensile strength 1770 N/mm^2; initial load per strand 70 kN
Cast-in fastening shoulders type 8081 to Pandrol specification CC-J
Rail seat positive acceptance test load 210 kN with supports at 560 mm centres
Nominal maximum weight of sleeper 319 kg
Outer to outer shoulder spacing to produce nominal track gauge of 1520 mm, assuming all parts nominal size and rail in contact with outer insulator, see Pandrol drawing.
Design: Sleepers designed to withstand 25 Tonne Axle Load - 160 Km/h